Clean up your disk
I have problems with “Compress Old Files”. When I run disk cleanup, deleting old compressed files takes a long time and may not finish after an hour.
Reza Masoudi
JS: Compress Old Files is a feature of the Disk Cleanup tool (cleanmgr.exe) in Windows XP, but it does not delete files. What it does is take files that have not been accessed for a specified number of days and compress them to save disk space. This wasn’t a bad idea when hard drives were small and expensive, but it’s not such a good idea now. The files that benefit most from compression are things like Microsoft Office files, and these are already compressed as standard when saved in the new Office 2007 and OpenOffice file formats. The files that take up most room - sound, image and video files with extensions such as jpg, mp3 and avi - are already compressed. Trying to compress them further takes a long time and they can end up larger than they were before. If you’re really short of disk space, it’s better to back up some large files to CD or DVD then delete them. External hard drives are an even handier option, but these should also be backed up.
Disk Cleanup can also perform a number of functions such as removing temporary internet files, removing downloaded program files such as ActiveX controls (not always a good idea), removing restore points (a bad idea) and uninstalling Windows components that you don’t use (possibly a bad idea). As such, it provides a useful one-stop shop for people who don’t want to be involved with the operation of their PCs. However, I think it’s better to get slightly involved and download CCleaner from ccleaner.com, which does most of the same jobs. If you need to compress files, you can do this separately. Bear in mind that Windows XP needs lots of disk space to store its swap file (code that temporarily doesn’t fit in memory), hibernation files, temporary files, directory entries etc. You should always try to leave 2GB of hard drive space free, and never less than 1GB, to keep XP running at its best.
Uninstallation blues
I have some unwanted software installed on my laptop which I can’t remove using the Windows uninstall tool. Can you suggest any free software that would do the job?
Mel Hallworth
JS: Add or Remove Programs, in the Windows Control Panel, is usually the safest way to uninstall programs. However, some programs come with their own uninstallation files, and these should be visible in the program’s Start menu folder, or in its folder in the Program Files directory on your hard drive. If neither of those applies, there are several free utilities that will do the job. The one you are most likely to have already is CCleaner. If you run CCleaner and click on the Tools icon, Uninstall is the first tool. The main problem with uninstalling software is removing the right registry entries without also removing ones you still need. CCleaner includes a good registry cleaner, and will also back up any changes it makes, so I tend to trust it.
However, there are a few more specialised uninstallation utilities, such as ZSoft Uninstaller 2.4.1 and Revo Uninstaller. The ZSoft program is quicker and has more features than Add/Remove programs, such as search and analyse, and it looks reasonably safe to use. Revo Uninstaller has lots of extra features including Auto Run Manager, Evidence Remover, and Unrecoverable Delete. It looks powerful, but could do a lot of damage if used carelessly. There are other options at SnapFiles. Bear in mind that some programs are designed to be hard to remove completely, either because they need to resist viruses that try to remove them, or because they have hidden anti-piracy features, or both. It’s a good idea to run a web search for the word “uninstall” plus the program’s name, to see if a special tool is available.
Disappearing applications
When I minimise Windows programs they no longer go to the Taskbar but disappear off the screen completely.
Phil Boddey
JS: The programs should still be running, so you can Alt-Tab to them. If so, Kelly’s Korner has a registry tweak to fix the problem: Line 240.
Ads on shutdown
When closing down Windows XP I get lots of ads, which I have to close as well. I bought AVG8, but the ads still come.
Sean Brogan
JS: There are no legitimate programs that display ads on shutdown, though it could be an adware program that you installed along with some free software. AVG should have identified it. Try running it again in Safe Mode. If that doesn’t solve the problem, try SuperAntiSpyware.
Backchat
Nicola Richard wanted a simple way to scan slides on a Mac and I suggested the Plustek OpticFilm 7200i AI film scanner. Roger Larkinson says Plustek’s OpticFilm 7300 (£169.99) “works well. The CD includes SilverFast software for Mac OS X 10.4 (Tiger), and software for OS X 10.5 (Leopard) is available as a download, I believe.”
· Get your queries answered by Jack Schofield, our computer editor at jack.schofield@guardian.co.uk. More at blogs.guardian.co.uk/askjack
