Some have small memory machines such as 128 Meg and while it will work, you will see many minutes pass until the boot is complete. At 256 Megabytes of RAM, my observation is that it's ok until we add a lot of other startup items OR the machine is plagued with some PARASITE. In my definition, a PARASITE includes any software I didn't want or ask for. This includes more than virus, worm, adware, spyware, malware, pest, hijacker and "others." Let me just paste my usual words about this at the end.
Without a little more information about the machine, there isn't much wrong yet.
Parasite removal programs.
http://reviews.cnet.com/5208-6132-0.html?forumID=32&threadID=1313&start=0 notes the five scanning tools and removal tools that are fairly safe. If one does encounter an issue, its always been damage done by the MALWARE. The most common issue being Layered Service Provider replacement which you can use LSPFIX (Hint: use http://www.google.com to find).
The thread has follow on discussions about new links if you don't want to use Google to find an item.
PS. All the tools are free.
After I have started up my computer, I can't do anything on the taskbar. It seems to be busy for quite awhile before I can do anything. It won't allow me to go into the start menu or close any icons. Any suggestions would be greatly appreciated.