There's many issues that could be the problem here...But here're pretty much the only issues I can think of.I'm not very experienced with laptops
Do you have the right drivers for your video card?You mentioned a reformat...Try to update your drivers. That might be the cause...Or, do you have a virus of some sort?My computer worked fine until I got hooked into my college's network, and now I pretty much HAVE to have virusscan turned on 24/7 or get mauled by SDBot...You may also have adware/spyware, try scanning for that with AdAware at www.lavasoftusa.com
Or google it if the site's wrong <.<;;
If it's not those, it more than likely IS a hardware problem, which will be hard to fix on a laptop, because laptops tend to have a different structure than desktops.Best you could do is try to get your local computer shop guy to take a look. The power supply COULD be at fault as JediKitsune said...
Please clarify, though.Is this laptop the same computer you played FFXI on before, or a different one?