Hi,
After a clean shut down, I cannot start win7 any more.
Safe mode stops at trying to load aswrvrt.sys then goes on to BSOD with STOP 50 error.
I have tested the memory stick with mem86 but no errors.
I have downloaded the tools that essexboy usually recommands but I do not have the link to Windows 7 64bit RC that is necessary to create the bootable USB with Rufus.
Please help.
Did you recently install the Windows 7 updates from August 12-13?? If so, it may not be an avast! problem at all. I had the exact same problem and discovered that the culprit was actually a couple of the recent updates from the latest ones from Microsoft.
Read the messages in the following link and see if they help at all . . . .
Microsoft is investigating behavior in which systems may crash with a 0x50 Stop error message (bugcheck) after any of the following updates are installed:
2982791
MS14-045: Description of the security update for kernel-mode drivers: August 12, 2014
2970228
Update to support the new currency symbol for the Russian ruble in Windows
2975719
August 2014 update rollup for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2
2975331
August 2014 update rollup for Windows RT, Windows 8, and Windows Server 2012 This condition may be persistent and may prevent the system from starting correctly.
It probably updated automatically, I am going to try removing this fntcache.dat file and see if it works.
In the meantime I am progressing with the other tools.
Thanks