O.S. can i uninstall my windows explorer and reinstall it?

Oops! Well, it may not be such a bad problem. This is what Microsoft has to say about it:
Reinstall Internet Explorer in Windows 8.1 and Windows 8 Because Internet Explorer is now a Windows feature in Windows 8.1 and Windows 8, you can't uninstall it. However, you can turn it off. To do this, follow the steps in the "Turn off Internet Explorer" section in Install or uninstall Internet Explorer (http://windows.microsoft.com/en-in/internet-explorer/install-ie) .

After you turn off Internet Explorer and then restart your computer, Internet Explorer will be removed from your computer.

You can also turn the Internet Explorer Windows feature back on to reinstall it on your computer.

To Reinstall Internet Explorer please follow the steps below.
1) Go to Start>Control Panel > Add/Remove Programs.2) On the left side of that Window Click on Add/Remove Windows Components3) In the next window which appears, Uncheck the Internet Explorer in the Components list and Click Next. This will Uninstall Internet Explorer.
4) To Reinstall it, Go to the same screen again and Put a Tick mark next to the Internet Explorer in the Components list and Click Next and Finish.
Hope this helps. Good Luck.
~SmokinJoe~

The full guide can be viewed at Microsoft's site to install / uninstall Internet Explorer 9 (eg use IE8):

http://windows.microsoft.com/en-US/windows7/how-do-i-install-or-uninstall-internet-explorer-9

I've pasted the relevant portion for your convenience:

To uninstall Internet Explorer

The following instructions apply to both Windows 7 and Windows Vista.

1. Click the Start button , type Programs and Features in the search box, and then click View installed updates in the left pane.
   

2. Under Uninstall an update, scroll down to the Microsoft Windows section.
   

3. Right-click Windows Internet Explorer 9, click Uninstall, and then, when prompted, click Yes.
   

4. Click one of the following:
   

   • Restart now (to finish the process of uninstalling Internet Explorer 9, and restore the previous version of Internet Explorer).
     

   • Restart later (to wait until you shut down or restart your computer).
     

Note

After you uninstall Internet Explorer 9, the previously installed version ofInternet Explorer will be available on your computer. It is not necessary to reinstall.

Please leave feedback if this was helpful. Thanks!

Click the Start Button and select Control Panel. Select Add or Remove Programs.

Find and select Windows Internet Explorer 8 from the list of available applications. Click the Remove button.
Proceed with uninstalling
Restart your system.
You should have IE 7 after the restart.

If you want to reinstall IE8, please visit link below
IE8

Regards,
katharsys_i

Ther are known conflicts with Vista and IE8 - particularly with Vista 64-bit.

I would suggest uninstalling IE8 and reinstalling IE7 or using an alternative browser such as "slimbrowser" (excellent program) or similar.

IE8 can be uninstall by using Add or Remove Programs module in Windows XP, but in Windows Vista, Windows Internet Explorer 8 is not considered to be a ‘program’. Instead, IE8 is categorizing as an ‘update’. Thus, users will not be able to find Windows Internet Explorer 8 in “Programs and Features” of Windows Vista.

To uninstall Internet Explorer 8, go to Control Panel, and click on Uninstall Programs link or Programs and Features icon. Then on Tasks pane on the left, click on View installed updates link. Locate and select Windows Internet Explorer 8 in the list of installed updates, and then click on Uninstall button. Click on Yes when asked that are you sure want to uninstall the update.

If there is no option of IE8 been found on “Programs and Features” or “Add or Remove Programs” dialog box, or uninstallation of Internet Explorer 8 is unclean (causing error message such as setup cannot continue because a more recent version of Internet Explorer has been detected on this computer when trying to downgrade to IE7), try to manually run the spuninst.exe.
To do so, go to C:\WINDOWS\ie8\spuninst\ folder (your drive letter may be different), and run spuninst.exe.

Restart the computer after uninstallation completed.

Hope that helps :)

Hello and thank you for using Fixya's services.

You can uninstall the add-ons in Internet Explorer and this will fix the problem. To do this, I have linked you to an article that will walk you thru step by step.

Please let me know if you have any questions or concerns. Glad to help!

http://www.ehow.com/how_4424435_uninstall-internet-explorer-addons.html

To avoid possible headaches from interference, I suggest you uninstall in Safe Mode:
Turn your PC on or Restart. As soon as you see the black and white screen, press and hold the F8 key. Continue holding until you see a black and white menu. Safe Mode is F3 or F5. 

Uninstall IE7
1. Click Start, and then click Control Panel. 2. Click Add or Remove Programs. 3. Scroll down to Windows Internet Explorer 7, click it, and then click Change/Remove.
If for some reason Windows Internet Explorer 7 does not appear in the Add or Remove Programs you should:
1. Open Windows Explorer 2. Click Tools | Folder Options 3. Click the View tab 4. Make sure the radio button next to Show hidden files and folders is on  5. Click OK 6. Click Start, and then click Run 7. Type: %windir%\ie7\spuninst\spuninst.exe into the text box and click Enter
If you find yourself still needing help uninstalling Internet Explorer 7, check out the IE7 release notes found on the Microsoft MSDN Web site.
Excellent link for IE7 download and repair
http://www.techenclave.com/guides-and-tutorials/uninstall-ie7-beta-from-your-computer-6196.html
Restart after uninstall, before reinstalling. For a fresh download of IE7:
www.microsoft.com/windows/downloads/ie

Hi,

You have not mentioned what OS you are currently using. However if you are using Windows XP

1. Go to Control Panel
2. Open Add Remove Programs
3. Select the windows tab and uncheck Internet Explorer to uninstall it.
4. Restart your PC
5. Repeat Step 2 and now check Internet Explorer to reinstall it.

This should fix the problem.

try using another web browser like mozila fire fox or opera. other wise u have to uninstall the internet explorer and reinstall it again. to uninstall in windows(xp)
* click on start--control panel.
*click on add/remove programs then click on ad/remove windows programs at the left corner of the pop up window.
*among the windows components, check for internet explorer and untick it then click on next to continue.
*when don restart yr system
to reinstall internet explorer
*follow the steps above to tick internet explorer thyen next n yr don.
it should work i suppose.

try using another web browser like mozila fire fox or opera. other wise u have to uninstall the internet explorer and reinstall it again. to uninstall in windows(xp)
* click on start--control panel.
*click on add/remove programs then click on ad/remove windows programs at the left corner of the pop up window.
*among the windows components, check for internet explorer and untick it then click on next to continue.
*when don restart yr system
to reinstall internet explorer
*follow the steps above to tick internet explorer thyen next n yr don.
it should work i suppose.
xerick nigeria