ISearchTech Problem

Try running the below tool. Download it first and then boot into safe mode with no network support and run the tool.

http://securityresponse.symantec.com/avcenter/FxIstbar.exe

Do not enable System Restore until all problems are fixed.
I do not know what you mean in the below, please clarify what you are talking about:

Have you run ALL steps in the READ ME FIRST?

 

The time frame you are talking about is to allow the power supplies in your PC to actually get to zero volts and to allow enough time to make sure all devices like hard disks and CD drives have completely shutdown before you power back up. Doing a power cycle to quickly can damage your harddisk? Waiting a minute should be more than sufficient and it won't kill you.

Please run the steps below.

- Download HijackThis 1.99.1

- Unzip the hijackthis.exe file to a folder you create named C:\Program Files\HJT

- Do NOT run Hijack This from the Desktop, a temp folder, or a sub-folder of C:\Documents and Settings, or choose to run it directly from the downloaded ZIP file.

- Before running HijackThis: You must close each of the following:your web browser, e-mail client, instant messenger, and programs like notepad, wordpad, MS Word etc. And any other unnecessary running programs.

- Run HijackThis and save your log file.

- Post your log as an ATTACHMENT to your next message. (Do NOT copy/paste the log into your post).

Also please post as attachments your Ad-Aware and Spybot logs.

 

As indicated in the sticky thread, HijackThis is always run in normal boot mode unless otherwise requested.

 

If you are using WinXP or WinMe, make sure you have system restore disabled (per the tutorial).
For all OS types, make sure viewing of hidden files is enabled (per the tutorial).

For your ISearchTech.PowerScan problem, do the following:

Copy the contents of the Quote Box below to Notepad. Then click File and then Save As. Change the Save as Type to All Files. Name the file fixwp.reg and then click save. (make sure you save it somewhere you can find it. Saving it to your Desktop may make that easy.) Double-click on the fixwp.reg file on your desktop (or locate it with Windows Explorer and double click on it if not saved to the Desktop) and when it prompts to add to the registry say yes.

Please run HijackThis and click on the "Open the Misc Tools Section" button on the open page. Then select "Open process manager" on the left-hand side. Look for the following process (or processes) and one at a time kill them by selecting it and then click "Kill process". Then click yes.
C:\WINDOWS\rklwsbe.exe
C:\WINDOWS\System32\msnupdateit.exe
C:\WINDOWS\System32\msnupdateit.exe

After killing all the above processes, click "Back".
Then please click "Scan" and select the following lines but DO NOT CLICK FIX until you exit all browser sessions including the one you are reading in right now:
O4 - HKLM\..\Run: [EGUAeCV] C:\WINDOWS\rklwsbe.exe
O4 - HKLM\..\Run: [Firewall Updater] msnupdateit.exe
O4 - HKLM\..\RunServices: [Firewall Updater] msnupdateit.exe
O4 - HKCU\..\Run: [Firewall Updater] msnupdateit.exe

After clicking Fix, exit HJT.
Boot into safe mode and use Windows Explorer to delete:
C:\WINDOWS\rklwsbe.exe
C:\WINDOWS\System32\msnupdateit.exe
C:\WINDOWS\System32\msnupdateit.exe

If you get an error when deleting a file. Right click on the file and check to see if the read only attribute is checked. If it is, uncheck it and try again. Other wise open Task Manager and kill the process if running then delete the file.

Now run Ccleaner (installed while running the READ ME FIRST). Now if running Win XP goto c:\windows\Prefetch and delete all files in this folder.
Now reboot in normal mode and post a new HJT log. And tell us how things are working.

 

You're welcome! Your log is clean! Yes you can enable system restore now! Hiding folders is not necessary and does not buy you any protection except maybe from yourself (you know... to hide protected operationg system files from you to avoid deleting by mistake). I always show everything because it makes it easier to find malware when you get any.

What you should do now is the steps in the below link:
How to Protect yourself from malware!