Internet Explorer / Java - Windows Cannot Display This Webpage

My computer shut down on Thursday sometime due to windows updates. When I came to work on Friday I was unable to log into one of my home based business work programs. I was told to uninstall Flash player and reinstall. It worked for a bit, but each time a script pulled up, it said "windows cannot display this webpage' and if I hit F5 I would get the script most of the time. On Sat, I was unable to get into IE at all, it would say DNS Server not responding.

I ran unplugged modem/router and reset it, rebooted pc and nothing worked. Sunday, I went online at DELL and ran a system checkup and everything passed, went to my program and it said Java was not installed on this pc. I uninstalled Java and reinstalled it and program still says the same thing. I did find a blog on google that said I needed Java 1.5 which will run along side the updated Java. Can't find 1.5 anywhere. I also did a system restore to Thursday and now my IE screen is blank, just a plain white screen. I need IE for my job, Google works fine.

System Info Utility version 1.0.0.2
OS Version: Microsoft Windows 7 Home Premium, Service Pack 1, 64 bit
Processor: AMD Sempron(tm) Processor LE-1300, AMD64 Family 15 Model 127 Stepping 2
Processor Count: 1
RAM: 2815 Mb
Graphics Card: ATI Radeon HD 3200 Graphics, 256 Mb
Hard Drives: C: Total - 290204 MB, Free - 237800 MB;
Motherboard: Dell Inc., 0F896N
Antivirus: Norton 360, Updated and Enabled