this keeps appearing on my screen

Its from Premeter adware..........

Do this:
go to http://www.lurkhere.com/~nicefiles/ , and download 'Hijack This!'.....
Unzip it to its own folder, doubleclick HijackThis.exe, and hit "Scan".

When the scan is finished, the "Scan" button will change into a "Save Log" button.
Press that, save the log somewhere, and please copy & paste its contents to the forum.

It will possibly show other issues deserving our attention, but most of what it lists will be harmless or even required, so do NOT fix anything yet.
Someone here will be happy to help you analyze the results.

If you have anything disabled by MSConfig or any other startup manager, please re-enable it before scanning to post.

You have no firewall or antivirus program

We will have to get you sorted out once your cleaned.

Download AdAware 6 181 from here: http://www.lavasoftusa.com/
Before you scan with AdAware, check for updates of the reference file by using the "webupdate".
Then ........

Make sure the following settings are made and on -------"ON=GREEN"
From main window :Click "Start" then " Activate in-depth scan"

Then......

Click "Use custom scanning options>Customize" and have these options on: "Scan within archives" ,"Scan active processes","Scan registry", "Deep scan registry" ,"Scan my IE Favorites for banned URL" and "Scan my host-files"

Then.........

Go to settings(the gear on top of AdAware)>Tweak>Scanning engine and tick "Unload recognized processes during scanning" and "Let windows remove files in use at next reboot"

Then...... click "proceed" to save your settings.

Now to scan it´s just to click the "Scan" button.

When scan is finished mark everything for removal and get rid of it.(Right-click the window and choose"select all" from the drop down menu)

Now re-boot...

Then
Download Spybot - Search & Destroy from http://security.kolla.de

After installing, first press Online, and search for, put a check mark at, and install all updates.
Next, close all Internet Explorer and OE windows, hit 'Check for Problems', and have SpyBot remove all it finds that is marked in RED

Run an online antivirus check from at least one and preferably 2 of the following sites....
http://security.symantec.com/default.asp?
http://housecall.trendmicro.com/
http://www.pandasoftware.com/activescan/
http://www.ravantivirus.com/scan/

Re-boot again.

Then post a new HijackThis log to check what is left.

And when this is all clean...
Consider installing the following:

SpywareBlaster v2.6.1 and SpywareGuard v2.2, to prevent Active-X drive-by installations, as well as provide real-time browser hijacking protection: http://www.wilderssecurity.net/index.html

IE-SPYAD, a registry file that adds a long list of known "sites" to the Restricted Sites of your Internet Explorer: http://www.staff.uiuc.edu/~ehowes/resource.htm