Please start the command prompt (cmd.exe) with admin rights [1] and run sfc [2]:
sfc.exe /scannow
Is it able to find and repair broken/missing files (create the txt file shown under [2] and look if all files are restored)? If not, replace the DLL with the file from your DVD [3].
If all files are restored, try to install the Sp1 again.
best regards
AndrÃ
[1] -US/windows7/How-do-I-run-an-application-once-with-a-full-administrator-access-token
[2]
[3] -to-extract-missing-system-files-from-the-dvd-of-windows-7vista/
If I run the downloaded service pack from the MS Download Centre (windows6.1-KB976932-X86.exe) as Administrator then the result is, after 10 minutes with the green bar only about about 50% across, the window defaults to: "Installation not successful, the referenced assembly could not be found, ERROR_SXS_ASSEMBLY_MISSING(0x80073701)."
Now the SP 1 (in-place) upgrade is failing because it can't find this package, which was initially installed in c:\windows\softwaredistribution\download\b4186802777a9eaf49ead41f5cceac0d0\Package_for_KB976902_RTM31bf3856ad364e35amd646.1.1.17105.mum
Then i cheked my other Windows 7 system for SP1 which it never asked for despite of having windows update set to automatic. So all recent updates were there except for SP1, which it never had asked for anyway. Then i decided to install SP1 on that one as well and then the trouble started. But was solved in the end with help of this forum and other articles. PIty of all the wasted time. I wonder if SP1 was necesairy anyway , as it could be a rollup of all previous patches and nothing more, i dont know. If trouble persists i will follow your advice to call on MS support if its free.
I installed windows 7 without service pack 1 and now, when I'm trying to input service pack 1 key, I get an error. Can I activate it when I simply install service pack 1 or I need to reinstall it from image with service pack 1?
Windows 7 and Window Server 2008 R2 Service Pack 1 (x86 and x64) - DVD (Multilanguage)
ed2k://filemu_windows_7_and_windows_server_2008_r2_sp1_x86_x64_dvd_619642.iso2048196608D1D032D20568F9ED16F072075F4E9961/
MD5: 9B0EA3588B8C8ABD7EAD91BDFE6CE3F8
SHA1: F2ABA1102E18EAD08C78527AB422C09AB7D1F54C
CRC32: B07748AE
Windows 7 Service Pack 1 (x86) - exe (Multilanguage)
ed2k://filewindows6.1-KB976932-x86.exe5639345047ACEF9E0B7DBA20F35D270CCEA647C83/
MD5: 4BF28FC00D86C936C89E2D91EF46758B
SHA1: C3516BC5C9E69FEE6D9AC4F981F5B95977A8A2FA
CRC32: 5EB0FA87
Windows 7 and Window Server 2008 R2 Service Pack 1 (x64) - exe (Multilanguage)
ed2k://filewindows6.1-KB976932-X64.exe9470700884F1CCD4532DDC457DEFD8063D19F8746/
MD5: 28D3932F714BF71D78E75D36AA2E0FB8
SHA1: 74865EF2562006E51D7F9333B4A8D45B7A749DAB
CRC32: 068C79C6
Window Server 2008 R2 Service Pack 1 (ia64) - exe (Multilanguage)
ed2k://filewindows6.1-KB976932-ia64.exe536437704CEB45BC3FA1C5F04B5CC477E5133C82A/
MD5: C0A186B85239BFAB823B22FF74C192B2
SHA1: 1AB97593F6F625392CA90B18F7617B0797A46F1C
CRC32: A23DE7CF
Windows 7 Service Pack 1 Language Pack (x86) - DVD (Multilanguage)
ed2k://filemu_windows_7_sp1_language_pack_x86_dvd_619716.iso2256947200C2E9A2E2A1A46237B18F6D55CA02458E/
MD5: DE23FE0711984BD0B9FA18E6BAED66CD
SHA1: E9261433FF5CCACA818328A9BDBBED3F21A6405E
CRC32: 463148B9
Windows 7 Service Pack 1 Language Pack (x86) - DVD (Chinese-Taiwan)
ed2k://filetw_windows_7_sp1_language_pack_x86_dvd_619609.iso2443018247E00614DB7D995BC6470F4679661A2A7/
MD5: C973CB21DE5A148799BB0F12910FC4AB
SHA1: 4E61F795884EAC5D7F16A95D0B2E823C2579C347
CRC32: C74C5248
ed2k://filetw_windows_7_sp1_language_pack_x86_dvd_619609.iso122464256D5AB20F03A5A93933B67B24331C2773A/
MD5: A83A74F662BDA0DAF7C6C60390BC6103
SHA1: 133E0509422BF5AE116264126E42FE72C1A605C9
CRC32: 5C2A11CF
Windows 7 Service Pack 1 Language Pack (x64) - DVD (Multilanguage)
ed2k://filemu_windows_7_sp1_language_pack_x64_dvd_619714.iso2745993216D5643546A3D61444CCC4D05BC24E4F11/
MD5: FC8F0E297AD646835C953436D100137B
SHA1: 7CD1FE568D968D89792DC9FF20E9AF2B318995C2
CRC32:1031E26F
Windows 7 Service Pack 1 Language Pack (x64) - DVD (Chinese-Taiwan)
ed2k://filetw_windows_7_sp1_language_pack_x64_dvd_646888.iso147802112A12A5DF08E1063F95DC19C493849ABDF/
MD5: CAA709E8719E78A619817A46F85D1470
SHA1: 7243277C41186C94DA465685DB17496EB152B1AA
CRC32: C00402B2
ed2k://filetw_windows_7_sp1_language_pack_x64_dvd_646888.iso1478021129592B2B28E245B653470BB120C84156D/
MD5: 47B26B3DDCF071C325E8ECB8C07A7387
SHA1: A20A46BB710559853EDA4409B59D91F7E2727DCD
CRC32: 0E88D997
Windows Server 2008 R2 Service Pack 1 Language Pack (x64) - DVD (Multilanguage)
ed2k://filemu_windows_server_2008_r2_sp1_language_pack_x64_dvd_619614.iso293529395220DD0ED551338EE2208AC2BCA8469497/
MD5: F6A8668E096E89F18BAEBB71BE1AD24B
SHA1: 79A25EDAAE853E1C78E7AB984D40ACFF0E53BD19
CRC32: 270682F8
Windows Server 2008 R2 Service Pack 1 Language Pack (ia64) - DVD (Multilanguage)
ed2k://filemu_windows_server_2008_r2_sp1_language_pack_ia64_dvd_619613.iso5336903688CA869813ABD53441AB5496BC7470FEB/
MD5: 6CA78707F220AB9E2B1AA2E2C5628FFE
SHA1: CE422496FD7596BF22827B1BAA71EABE19906C2A
CRC32: A63900AF
Windows Server 2008 R2 Service Pack 1 Language Pack (x64) - DVD (Chinese-Taiwan)
ed2k://filetw_windows_server_2008_r2_sp1_language_pack_x64_dvd_619616.iso9026764813C079F0D674363BABC3012A2006C8A3/
MD5: D418419B87114FD948BC6CF45A370F5A
SHA1: A7CD937709CADFFAEDC9C4251E62DE4CCC241F9E
CRC32: 9366DDC5
Windows Server 2008 R2 Service Pack 1 Language Pack (ia64) - DVD (Chinese-Taiwan)
ed2k://filetw_windows_server_2008_r2_sp1_language_pack_ia64_dvd_619615.iso832348161889E1BDC6AA549D242682747CC6B565/
MD5: 4A4FE7D75BD1DAFCFDF3BEB6FAF1DFF5
SHA1: 7E86201D194BD7F7066EF5785F597A3EF1BD493F
CRC32: 6EFDF230
Windows 7 Starter with Service Pack 1 (x86) - DVD (English)
ed2k://fileen_windows_7_starter_with_sp1_x86_dvd_624016.iso25630392329AB87599F2D811CB9C39E0E3417273C5/
MD5: 59BE6D3057BCAA40A488DE08B0AAAAD9
SHA1: 8EE6A873F18F8D13ACDB3C79A14D42AF70348BF6
CRC32: 3FAD23CE
Windows 7 Home Basic with Service Pack 1 (x86) - DVD (English)
ed2k://fileen_windows_7_home_basic_with_sp1_x86_dvd_620759.iso2563039232751B4680F192A6E3E708392027D1DC8F/
MD5: F1B2DCB226876FA195A5542AB818FB9F
SHA1: 047AF9ECEA6F9430B2C0CA64CE8A6F888FCD5A64
CRC32: 50277BC7
Windows 7 Home Premium with Service Pack 1 (x86) - DVD (English)
ed2k://fileen_windows_7_home_premium_with_sp1_x86_dvd_620895.iso2563039232F3913DFA34DC8046EDF66960E03DD65C/
MD5: C5BB99B2F1A9E7A5B4FBC6E3EFF70882
SHA1: 22DF3E5A80F8DBF014C2776A01B1CD9F24D83233
CRC32: 9C5DC931
Windows 7 Home Premium with Service Pack 1 (x64) - DVD (English)
ed2k://fileen_windows_7_home_premium_with_sp1_x64_dvd_620851.iso3319478272A6C07AFAC9205B36E6ED99538211C5B2/
MD5: 971843A457B6E0DB0AF61258CBE7256A
SHA1: B4821F46A171708F5F8F8A0EF48FC16529437961
CRC32: D236FD70
Windows 7 Professional with Service Pack 1 (x86) - DVD (English)
ed2k://fileen_windows_7_professional_with_sp1_x86_dvd_631025.iso256303923270DB0BC59EB7B6763DD352535015A618/
MD5: BEFD4F1E00EC8DA2EFFBD789F4E66FBF
SHA1: 917A542B0541054BB9C2A06A11A46AED6943856B
CRC32: 20078D8D
Windows 7 Professional with Service Pack 1 (x64) - DVD (English)
ed2k://fileen_windows_7_professional_with_sp1_x64_dvd_621750.iso3319478272B84DB34D00211AF704F1EB09A8CF6921/
MD5: 338F3245D68527DB47B8A44E55317D0A
SHA1: 5ED2584110E03F498DB4458BA9FAFD5A7EF602ED
CRC32: 74F3CB73
Windows 7 Professional with Service Pack 1, VL Build (x86) - DVD (English)
ed2k://fileen_windows_7_professional_with_sp1_vl_build_x86_dvd_623530.ISO243321651248B7948A7BCA2CB56795F03332811FCD/
MD5: 637EF96096EDDBE7BF5A4A1ACEEC71BA
SHA1: 85E9767CD50C6083160393F85CB2C4156CD9348D
CRC32: 7F1BDDD3
Windows 7 Professional with Service Pack 1, VL Build (x64) - DVD (English)
ed2k://fileen_windows_7_professional_with_sp1_vl_build_x64_dvd_622458.ISO3181668352CC8937EEA6B1EA7B8BDB3881236BA878/
MD5: 83FE84A7968E7EF226B9BE45CBE4F9AA
SHA1: 647C756B95EEF95C05EA04EEAFED035E0065EB9E
CRC32: 6D9135C2
Windows 7 Enterprise with Service Pack 1 (x86) - DVD (English)
ed2k://fileen_windows_7_enterprise_with_sp1_x86_dvd_620186.iso2433157120C592647AFD661B183CD1A6C5774B36DE/
MD5: 0F75C64DE4B10FD581845ABA99E1591D
SHA1: 4788041EB06E0F49720C112FBD256AC637909D4F
CRC32: E3382829
Windows 7 Enterprise with Service Pack 1 (x64) - DVD (English)
ed2k://fileen_windows_7_enterprise_with_sp1_x64_dvd_620201.iso318123417649320FA39FFE3F5C09719EC225E04EFC/
MD5: 8DB2FA2C64160F582BD099E86DBE219F
SHA1: 2C9774A1F48570E749E6D33C642FE8F6F7898CB0
CRC32: DCA3CF57
d0d94e66b7