The free version will only run on Win 98SE and ME. If you have the non-free version (incl. hardware), then check that your PC meets the requirements that ProTools demands.
Dunno about the free version shyt... but I've been on 001 for a year and soon to be 002.. No probz here...If it's not the free version u might need to reformat Ur computer! (when i 1st got 001 i had to reformat my shit for it to wrk correctly)
there is a few work around like havin xp And win 98 on yur pc or gettin sumkingd of win 98 emulator shit that will trick programs into thinking u have 98,im not big on that hackin shit ,its just stuff i heard