Please could any one out there please advise me for a reliable anti-virus/anti-spyware programs that I can use on my lap top computer as it was only designed for use with Windows 'ME'

I have tried to upgrade it to XP but there is not enough space on the hard drive, and you cannot upgrade the CPU.

The lap top is a Compaq Presario XL 1200 as I no longer use it much know it is difficult to know what to do with it , the only reason I still have it is as a back up to the desk top.

Thank You for your time in this matter.