ZASS 9 recently notified that it had found Packed.Win32.Krap.ai in C:\WINDOWS\system32\msls51.dll. It was unable to repair the file or quarantine it so I agreed to it being renamed. However, when I next rebooted most of the startup failed to work due to a 'missing' msls51.dll leaving me with no icons. I was able to rename the file back to its original name via Task Manager but ZA is still telling me I'm infected. I've tried to follow the advice on here about false positives and problems associated with older versions of ZASS, but I'm really not sure whether I have something to worry about or not and would be grateful for any advice.
I'm running ZASS 9.1.008.000 on a desktop PC with MS Windows XP Prof with SP3, Intel Pentium 4 CPU 3.40GHz. I'm also running SUPERAntiSpyware 4.34.1000