[quote=hannah_rhia19]uhmm.. last night when i open my pc, it says that "please re-install application" something like that.. i was wondering if what software i need to re-install.. do you encounter this problem what will i do btw, thanks in advance.. [/quote] Restore your System in Earlier time! try to run System Restore! Click Start>All Programs>Accessories> System Tools>System Restore in System Restore Window select the "Restore my computer to an earlier time" and Click Next Select the date or time that you want to Go back, (the time that your computer has no error or something)! and click next! Wait for the restart! and done! hope it help!