I was infected with the mkMSITStore:C:\WINDOWS\start.chm::/start.html hijack a few days ago and have been trying to get rid of this pesky thing. There's a lot of help on various BBs but I haven't yet found a full solution for eradicating this beats from my PC. Here's the story so far: I run NAV with latest updates as a matter of course (not that this will touch this type of critter). I've been running CWShredder, Ad-aware, and SpyBot for several months since I previously contracted CWS. Yesterday I downloaded SpyFerret, SpyBlaster, and SpyGuard. Like many other before me the usual signs were there. NOTEPAD.exe was gone but there was a NOTEPAD.exe.bak in it's place. I've sorted that out. START.chm was there with it's payload. I tried deleting the contents yesterday and setting the file to read only. But at some point the file as deleted - I think it may be as a result of running one of the many pieces of Spyware software above but can't say for sure. Deleted the R0 entries that show within HijackThis. Ad-Aware showed some other registry entries so I got rid of them. I rebooted the PC several times yesterday evening and each time all was well. I went to bed thinking maybe it's sorted. When my wife used the PC this morning she fired up Outlook, which connects automaticlly to our hotmail account and SpyGUrad popped up the warning that the IE homepage was being changed. Form the SpyGurad messge alert, I opted to revert to my previous homepage, and notice that start.chm is back. Again I have deleted it's contents and made the file read only. I may have this thing under control but who knows what else it's trying to do or waiting to do on my machine and I am peeved that it's still there. Something is on the PC waitig for it to connect to the internet before resetting the homepage and changing files etc. on my PC Is there any way of getting rid of this thing completely?? I'm happy to produce any logs people may feel useful. Please let me know whether you want Ad-Aware or HijackThis etc. Meanwhile I'm going torun my suite of scanners to see if there's anything they pick up.