|If you actually only have 256 MB RAM that will be at least part of your problem. The stated minimum for XP is only 64MB and in the early days 256 MB was considered quite a lot of RAM. But when using modern browsers, ant-virus programs, and other modern applications, 256 MB just isn't enough. And when taking into account that your processor is probably old and slow, poor performance is to be expected. To get decent performance with modern software you need at least 512 MB and preferably more.|
There isn't really anything that can compensate for a shortage of RAM.
256 MB RAM is a lot for Win98 but only barely adequate for XP.
Avoid all registry cleaners. They don't help and are far more likely to cause problems.