Whoa, slow down. I think your windows installation is broken.
Let's see if I understand you correctly. You had windows installed, and everything was fine. Then you installed Linux and let the installer shrink your windows partition for you. Linux now boots fine, but windows has problems. Windows will still boot, but you have trouble with your video and with the network.
Does this sound right? Am I missing something?
Which distribution (flavor of linux) and what version are you using?
Ok, now down to business. It sounds like your windows NTFS partition did not get shrunk correctly. The problems are probably not drivers, but windows components that deal with those drivers. Find your windows install CD, and let's get started.
First, boot off the install CD. The first thing that it will ask is if you are installing windows, or if you want to "repair" windows using the recovery console. Choose the recovery console. It will be something like a DOS prompt. Many DOS commands work here, but don't let it fool you. It's not DOS. Here, you are going to want to run "chkdsk /r". This will take a long time to run, but it should make certain that your filesystem is stabalized.
Now that your filesystem is no longer busted, you will still need to fix your windows system itself. There are two ways to do this. The easier way is to boot windows, and run the following command (start-> run) "sfc /scannow". This will look for any system files that have been changed, but shouldn't have. If if finds any mistakes, it will ask for the windows CD so it can replace the damaged files.
The more reliable way to fix a windows install, is to do a repair install. Boot off of the install CD again, and this time choose to install windows. Be careful here. If you are lucky, it will tell you that it has found a previously installed copy of windows, and will ask if you want it repaired. This is what you want. Again, be careful. If the installer can't find your installation, it won't ask you to do a repair! If it asks where you want to install windows, then you've gone too far. The repair install will replace all of the windows system files. Don't worry, you won't need to reinstall any programs. Most of the registry is left alone. You may need to provide your CD key and reactivate windows.
The advantage of using one of these repairs, you do not need to truly reinstall windows. Your programs and documents will be intact (though those too might be broken because of the filesystem).
If this does not help, then you may need to reinstall windows. Post back and let us know how things are going.