Hi i just got sonic riders recently and i installed it and it has a couple problems. 1 it seems like the game is going so slow for some reason it takes like 3-4 secs for the countdown in the game to go to 1 sec and 2 the subtiles in the game go slower too so its like the alrady say the stuff then 10 secs later the subtitles pop up my specs are windows xp service pack 3 512 mb of ram nividia geforce fx 5500 128 mem i think celeron 2.40 cpu
Your computer isn't that powerful so it could be that its not good enough to run the game, a Celeron CPU with that video card and 512 Ram is pretty bad. Try turning down the graphics settings all the way and see if it works. BTW, its time for a new computer if thats your only computer and you wish to play games on it.
yeah your computer too slow, but let's work around it. in the settings. choose less frames per second (fps) i think you the the option of 60, 30 and so on. the less you choose the quicker the game runs but not as smooth. reduce all the settings and choose a lower resolution. the game is very strange. it used to work slow on computer but now works normal speed all of a sudden.