I have a MacBook 13" 2.0 GHz Intel Core 2 Duo 10.4.11 I am a medical student and I have 9 MAJOR exams beginning within the next 7 days. I force quit parallels (I have since learned not to do this). After the force quit parallels wouldn't open anymore and told me that it was in use by another application. I found a parallels support page and went to Terminals and typed the path to the winxp.hdd file (which i did correctly) and then I typed chmod 666 and it didn't work. so i just typed in chmod 666* (i didn't put in the path again). this did not fix the problem with parallels. however, i found this support page from parallels - telling me to delete the .lck file - and it did work (http://kb.parallels.com/en/4938). parallels was running again but i was running into other problems with other applications telling me i didn't have permission to open them. i went into disk utility and did 'repair disk permissions'. i thought that solved the problem (it didn't). Because i thought the problem was solved and everything was just fine i downloaded a driver for our campus printer - which came from the manufacturer's website found here (http://www.ricoh-support.com/enduse....com/bb/html/dr_ut_e/re/model/mp90/mp90en.htm). The PDD Installer for version 10.4 didn't seem to do anything so i downloaded the one for 10.5. I then noticed that firefox wasn't working very well and eventually wouldn't open at all (it just bounced in the dock). I also noticed that every other program was doing the same thing. I decided that it would be best for me to just restart my computer. Things have now worsened. I can't open skype because of some permission thing, my dock looks like it did when my computer came out of the box and so does dashboard, nothing will open (word, excel, powerpoint), itunes shows me the user agreement when i open it as though it's being opened for the first time, shrook (rss reader) opens but all the rss feeds that i had subscribed to are gone, safari opens but i keep getting this damn popup about some keychain issue, but all of my files are still present on my desktop in their little folder (they just won't open because none of the applications will open). I had already backed up 90% of all files on an external hard drive and the rest I can get from a shared drive. I am 3000 miles from my home Apple store and currently in a country that does not have one at all, I cannot e-mail them because they don't do e-mail tech support and 1-800 numbers only work if you are in the US so I can't call them because I don't have a direct number to Apple. I have a backup iBook but I really need to be able to run parallels. My stress level probably just set a world record. Please help me.