I am trying to fix error 45054 but my computer doesn't have magnifying icon or search field when I press the windows key?

Hello bigpita1,

We would like to see how we can help you with error -45054 in iTunes. Were you able to quit the iTunes app? Have you tried the Control (Ctrl) and Escape (Esc) keys on your keyboard instead? Be sure to follow the steps in the link you came from and get back to us with any questions you might have: If you see a -45054 or -42110 error in iTunes - Apple Support

"Fix a -45054 or -42110 error in iTunes for Windows 

1. Quit iTunes.
2. Press the Windows key on your keyboard. If your keyboard doesn't have a Windows key, press the Control (Ctrl) and Escape (Esc) keys on your keyboard.
3. Click on the magnifying icon or search field. In the search box, type %ProgramData%, then press the Return key.
4. Show any hidden files:

• Windows 10: Click View, then select "Hidden items."
• Windows 8: Click View, then click Options. On the View tab, select "Show hidden files, folders, and drives."
• Windows 7: Click Organize, then "Folder and search options." On the View tab, select "Show hidden files, folders, and drives."

5.Open the Apple Computer folder, then the iTunes folder.

6.Delete the adi and SC Info folders: Right-click each folder and choose Delete from the menu.

7.Restart your computer.

8.Open iTunes and try to make a purchase."

Cheers!