Have both the A205 and A305 Toshibia loptops
The A205 I Downgraded from Vista to XP - Not Problems. Later I upgraded to Win 7 RC - again no problems. However I now have to decide if I want to (1) go back to vista (still have HDD0, (2) reconnect HDD w/XP, or (3) upgrade to Win 7. Will probably go with XP or win 7 Vista is a resorce hog for lower end Laptops, Win 7 is better, but don't know if it's worth the $100. Upgraded A305 to Win 7 and a Blu-ray Player/dvd writer and memory to 4 gigs - Stayed with 32 Bit.
I see Toshibia list a modem drivers for the A215-S5822.
For XP SP2/3 it's Ver 2.1.01 dtd 09/18/2007 (For XP/XPSP2&3/Vista...