sfc/ scannow results show two 'cannot repair' files..

thanks everyone - will try your suggestion bill. brilliant!
i'll confirm if it works....

ok mixed results, i.e. i don't know if this is a good or a bad thing.. it certainly isn't as satisfactory as an 'all problems fixed' message..

repair install declares there are NO system file errors found, yet sfc /scannow still says the same two files are corrupt.

which scan log should i trust? here are some excerpts from the CBS log, after doing the sfc scan:

Beginning Verify and Repair transaction
2010-07-26 09:45:49, Info CSI 00000027 Hashes for file member \SystemRoot\WinSxS\amd64_microsoft-windows-autochk_31bf3856ad364e35_6.1.7600.16385_none_3de8def0db722996\autochk.exe do not match actual file [l:22{11}]"autochk.exe" :
Found: {l:32 b:fPNpK6dYKZ3euJxntH2qc2VZeULmkrSt3o1gcFbe1vo=} Expected: {l:32 b:O9osH5IuxnI1PLLylnIPx189Vzpvz4ebIg63k2Ec+C4=}
2010-07-26 09:45:49, Info CSI 00000028 [SR] Cannot repair member file [l:22{11}]"autochk.exe" of Microsoft-Windows-Autochk, Version = 6.1.7600.16385, pA = PROCESSOR_ARCHITECTURE_AMD64 (9), Culture neutral, VersionScope = 1 nonSxS, PublicKeyToken = {l:8 b:31bf3856ad364e35}, Type neutral, TypeName neutral, PublicKey neutral in the store, hash mismatch


and


Beginning Verify and Repair transaction
2010-07-26 09:54:47, Info CSI 0000014c Hashes for file member \SystemRoot\WinSxS\amd64_microsoft-windows-tapicore_31bf3856ad364e35_6.1.7600.16385_none_402eca316047a0fe\tapiperf.dll do not match actual file [l:24{12}]"tapiperf.dll" :
Found: {l:32 b:z+//sY/hqz911nuo9dbaqACtI9ZCl0wpe7vj8XgHOqw=} Expected: {l:32 b:RXQlQ6phxah9eNxo5exJMr49m/IoBNQKZbkYC/XRzTA=}
2010-07-26 09:54:47, Info CSI 0000014d [SR] Cannot repair member file [l:24{12}]"tapiperf.dll" of Microsoft-Windows-TAPICore, Version = 6.1.7600.16385, pA = PROCESSOR_ARCHITECTURE_AMD64 (9), Culture neutral, VersionScope = 1 nonSxS, PublicKeyToken = {l:8 b:31bf3856ad364e35}, Type neutral, TypeName neutral, PublicKey neutral in the store, hash mismatch
2010-07-26 09:54:51, Info CSI 0000014e Hashes for file member \SystemRoot\WinSxS\amd64_microsoft-windows-tapicore_31bf3856ad364e35_6.1.7600.16385_none_402eca316047a0fe\tapiperf.dll do not match actual file [l:24{12}]"tapiperf.dll" :
Found: {l:32 b:z+//sY/hqz911nuo9dbaqACtI9ZCl0wpe7vj8XgHOqw=} Expected: {l:32 b:RXQlQ6phxah9eNxo5exJMr49m/IoBNQKZbkYC/XRzTA=}
2010-07-26 09:54:51, Info CSI 0000014f [SR] Cannot repair member file [l:24{12}]"tapiperf.dll" of Microsoft-Windows-TAPICore, Version = 6.1.7600.16385, pA = PROCESSOR_ARCHITECTURE_AMD64 (9), Culture neutral, VersionScope = 1 nonSxS, PublicKeyToken = {l:8 b:31bf3856ad364e35}, Type neutral, TypeName neutral, PublicKey neutral in the store, hash mismatch
2010-07-26 09:54:51, Info CSI 00000150 [SR] This component was referenced by [l:202{101}]"Microsoft-Windows-Foundation-Package~31bf3856ad364e35~amd64~~6.1.7600.16385.WindowsFoundationDelivery"
2010-07-26 09:54:51, Info CSI 00000151 Hashes for file member \??\C:\Windows\System32\tapiperf.dll do not match actual file [l:24{12}]"tapiperf.dll" :
Found: {l:32 b:z+//sY/hqz911nuo9dbaqACtI9ZCl0wpe7vj8XgHOqw=} Expected: {l:32 b:RXQlQ6phxah9eNxo5exJMr49m/IoBNQKZbkYC/XRzTA=}
2010-07-26 09:54:51, Info CSI 00000152 Hashes for file member \SystemRoot\WinSxS\amd64_microsoft-windows-tapicore_31bf3856ad364e35_6.1.7600.16385_none_402eca316047a0fe\tapiperf.dll do not match actual file [l:24{12}]"tapiperf.dll" :
Found: {l:32 b:z+//sY/hqz911nuo9dbaqACtI9ZCl0wpe7vj8XgHOqw=} Expected: {l:32 b:RXQlQ6phxah9eNxo5exJMr49m/IoBNQKZbkYC/XRzTA=}
2010-07-26 09:54:51, Info CSI 00000153 [SR] Could not reproject corrupted file [ml:520{260},l:46{23}]"\??\C:\Windows\System32"\[l:24{12}]"tapiperf.dll"; source file in store is also corrupted

the disk that i downloaded following your advice Bill allowed me to do a 'system repair' at boot (giving me the results i already mentioned, 'no system errors found'). But it seems the original suggestion of doing a 'repair install' is a different kettle of fish.. reading the article about how to do a repair install here: Repair Install
The interface for a repair install happens from within windows, not at boot.. and has different options from those i was given.

:/

Hey Alex,

No, you cant run a repair install from a recovery disk like Neosmart's, for that you need an Install dvd. Do you have one?

OK, can we just recap what exactly the current problem is?

Hi bill, thanks for clarifying. I don't have a full installation dvd - i uprgaded to 7 from vista and to do this i downloaded the upgrade, rather than getting the dvd.

The problem is simply that i'm receiving this error message when i scan in sfc, and in the CBS log it says it cannot repair files autochk.exe and tapiperf.dll (see some of the log in my recent post)

ok thanks john, good to know.. unfortunately i can't get hold of that media now so i suppose i'll have to wait til i have access to the portable hard drive again, in a month or so.
cheers

1) Unless there is some actual problem that you are experiencing, it is futile to look into the event viewer IMHO.

2) Having said 1) above, I reread the log. The last line says "tapiperf.dll; the source file in store is also corrupted". That means that eventually you may need to access a win7 install dvd to get a good copy of the file.

3) Regarding the autochk error, go through this thread and the links it has.

Corrupted system files cannot be repaired. SFC /scannow cannot repair

Did you burn that downloaded upgrade to dvd? I think this would be that student deal, you can easily make an iso.

Make bootable iso from student d/l

Then, you can try extracting good copies of the files from there.

Extract Files from Windows 7 Installation DVD

Edit: The digitalriver isos can be downloaded.

http://windows7center.com/forums/win...iso-links.html

thanks bill i'll check it out. i've already downloaded that hotfix from microsoft though (the one linked from within your link) and sfc still doesn't like autochk.

i think it'll all have to wait til i get back to the media, and turn it into a dvd

thanks so much for all efforts (i'm giving up on this one til i can use the dvd..)

alex