Right-click anywhere in an empty space (no icon) on your desktop. Select "Properties". Click the "Desktop" tab, then locate and click the "Customize Desktop" button. In the "General" tab, look in the bottom panel - "Desktop cleanup". Click the "Clean Desktop Now" button to open the Desktop Cleanup Wizard, and click "Next" to start the wizard. The next box that opens will show a list of Desktop Icons, along with "Date Last Used" for each icon. To remove an icon from your dektop, place (or if already checked, leave) a checkmark in the box to the left of the icon. Icons not checked will be left your desktop . When you've made your selections, click "Next", review the selections, and either click "Back" to re-edit your choices, or click "Finish" to remove the selected icons. Click "OK", "Apply", and "OK" again to exit to your desktop. That takes care of your icon situation. Unnecessary folders and documents may be deleted or moved off the desktop to any other folder you wish.
Now, for what's running on your machine, if ya want me to take a look and offer suggestions, do the following:
Download
HiJackThis,
and extract it to a folder of its own either in your Programs file or directly on your root drive.
To place HJT in its own folder, open Windows Explorer (Windows key + E - locate and select your root drive, the drive on which Windows is installed, and open that folder, right-clicking anywhere in that folder's blank space, select "New">"Folder", name the new folder "HJT", then download and extract HJT into that folder.
Launch the application by clicking its icon from within its folder, then from HJT's splash screen, choose "Miscellaneous Tools", or from the main start page, select "Config", then select "Search for updates online", confirm, and be sure your's is the latest version. When you are sure HJT is properly located and updated, close it, then re-open it. Select "Do A System Scan and Save a Logfile". When the scan has completed, copy-and-paste the entire logfile to this thread. Do not "FIX" anything yet; wait for specific instructions.