After a few months of use (since the last reinstall of Windows XP) my parents' computer's start menu has become typically disordered. The obvious solution to this is to right-click and then 'sort by name.'
Unfortunately, when trying this, the context-menu flashes up and then disappears (so fast as for the flash to be barely noticeable). I'm assuming that, somewhere along the line, a right-click handler's become screwed up somehow, but for the life of me I can't think how. I've used a few online virus scans (Trend Micro's HouseCall, Bitdefender and Panda Security's 'ActiveScan'), along with AVG installed to their machine to try and rule out malicious software (all scans coming up negative).
Are there any obvious culprits I should look at? Or registry settings that can be removed/amended/deleted to enable right-click to work as normal?