F Secure 2010 + Windows XP "Scan Wizard" won't start under any condition.
I tend to do a monthly scan for a very old computer (only 1GB RAM) with XP SP 3, but since last month I have been unable to run any kind of manual scans, and schedulled scans don't run at all. The "Scan Wizard" never appears after clicking on the scan/Full Computer Scan nor any other options. Sometimes the Security Suite window simply disappears after clicking it (like if the app crashed). I have reinstalled the application time and time again, using CCleaner and the F-Secure uninstallation tool, but to no avail. I also have run a couple of times MalwareBytes and SuperAntiSpyware.
Please give me a hint of what to do as I don't want to format the computer because of this, as otherwise has been working fine.