If you are working on Office documents, you need to set it to autosave every few seconds so you will have a backup of it even if you dont manually save it yourself. To do this, go to Tools, Options, Save, then click on Always Create Backup Copy, Save every 1 minute. Then go to File Locations and make a location to have these auto saved in. Do this with Word, Excel, etc open. Now for your other problem, did this problem start after you started to delete items from Hijack this? Did you go to Device Drivers and see if your modem has a question mark on it or exclamation, something yellow, etc, one of them?