It's possible a virus caused such an issue, but it's more likely they were deleted by a program designed to free up disk space, no other restore points were created recently, or there was not enough space reserved to store more than the most recent restore point. For a test of the functionality, try creating a new system restore point, rebooting them computer, and then seeing if it is listed as a potential restore point to restore to.
well as i said in an earlier post, i dont kno how to find out things i should kno about my computer so if sum1 can dirct me to that then thank u. my problem is that when i try to do system restore the arrows on the calender wont move and it only allows me to retore to my current date. my boyfriend told me that my pronlem is a hacker but i hope its not so i would like to kno if it could b sumthing else... i really need help on this asap!!!
thank u for ur time,