I can not find the 260 model so assuming it is the Acer Travelmate 2600 (?) this is a direct link to the driver downloads available for that machine:http://support.acer-euro.com/drivers/downloads_gd.html
I would recommend that anyone backs up their drivers with Driver Genius Pro. The program and the driver backup should then be stored on a disc, or a seperate drive if you run multiple slaves, for those lovely little hard drive wipeouts that occasionally must be performed or on the occasion your drive just decided to die. You can get a free trial or if you are familiar with using torrents (or have a pirate firend) it is listed on isohunt.com as well seeded.
As for running slow, does it have a lot of programs installed in addition to the usual windows default stuff ? Since you got it off ebay and I dont know if you bought it new or second hand then I am guessing it may have.
Open up your task manager and click on the processes tab to see what is taking the most cpu. Sometimes its no more than a simple case of your browser being left open too long and hogging memory. Firefox is a bitch for that, for instance. If it is the browser simply close it and reopen it. If it is another process running away with the cpu - and you are familair with what it is and know it can be shut down without affecting the running of the machine - then do so. You can google any process name you aren't familair with to find out what it is and does before shutting it down.
Its also possible that there isnt enough installed memory to run windows. It is generally accepted that xp needs at least 512mb to run windows alone and that it easily overtaxed by running too many applications at once. Hence newer machines now come with up to 3 gig of memory and people with older machines would be advised to have a memory upgrade done as new machines were only sold with half a gig (512mb).
Finally, its possible the machine is virused or has a trojan if it is second hand. Check your antivirus is up to date and make sure regular scans are done.
Sorry for long post but hope it helps.