Hi I am a registered user on my second year with nod32 and have been very happy with it. I am getting problems now when trying to to on demand scans. I am unable to do an IN-depth scan as it instantly crashes and I get an error saying nod32 on demand scanner has encountered a problem and needs to close. appname nod32.exe appver: 18.104.22.168 offset: 00ac04c0. I seem to be able to do a scan of local disks and scan under Run Nod32 (on deman scan) but if I go into the setup area and select use advanced heuristics it won't scan the scan window just disappears and leaves no error message. I uninstalled and reinstalled nod32 and it didn't help. The only other active running security app is outpost firewall pro 4 and I tried disabling it but nod32 still won't scan properly. Any ideas? Thanks My operating system is winxp home and it's updated. A Core 2 duo @ 2.13, 2 gb ram.