Asked by
Kunnu Yuck
in
Computers & Technology
at
11:02 AM on November 10, 2008
Dan Dan's Answer
Without a complete uninstallation you may not be able to reinstall Deep Freeze on your system.
What we are going to do is edit the registry and delete the startup references to Deep Freeze. This will prevent the Deep Freeze driver from starting up the next time you boot. (c:\windows\system32\drivers\deepfr z.sys)
1. First we need a way to edit the registry. The way to do this depends on your situation. If your computer is thawed you can simply use Regedit. If your computer is frozen or if it doesn't boot you'll need to find another way. Here are some alternatives:
If you have a multiboot computer with another copy of Windows 2K/XP you can boot from there. Or, you can physically mount the disk on another computer that uses Windows 2K/XP.
You will probably use a tool that lets you boot and edit the registry. A good example of this is PE Builder that lets you build a Windows PE CD and boot Windows from there. Or use Bart's, http://www.nu2.nu/pebuilder/ or Winternals ERD Commander. There are several, including some USB memory sticks capable of booting like a CD. The goal here is to boot separately from your hard drive and access it while it is "asleep".
2. If your computer is thawed run Regedit. If it's not thawed follow one of the alternatives described above, and run Regedit (or Regedt32 on Windows 2K).
3. On the Find dialog box type UpperFilters and check only the Values checkbox. Then click Find Next.
4. The program will find a value with the name UpperFilters. Open this value and if there's a line with the name of the Deep Freeze driver (DeepFrz or DepFrzLo) delete it including the return, leaving the rest of the lines intact. Also, if you are using ThawSpace and you want to get rid of it delete that line too (ThwSpace), if you want to keep the ThawSpace leave it there. Press F3 to find the next match and repeat the operation until you have fixed all the UpperFilters values inside the HKLM\MySystem key.
5. Navigate to HKLM\MySystem\Select and check the value with the name Default. It has the number of the control set key that the system will use when booted. If it is 1 the control set is ControlSet001, if it is 2 the control set is ControlSet002, and so on. We'll assume the control set is ControlSet001 but you should use the one specified by the value Default.
6. Now go to HKLM\MySystem\ControlSet001\Service s and delete the keys with the name of the Deep Freeze drivers (DeepFrz or DepFrzLo and DepFrzHi). Also, if you decided to get rid of the ThawSpace delete the key with the name of the ThawSpace driver (ThwSpace).
7. That's it. Now reboot and Deep Freeze will not load.
Answered at
12:56 PM on November 10, 2008
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