General Computer Questions

installed wifi on pc running xp but after switching pc off and then on again I can no longer connect to internet . The programme can no longer find a signal, I then have to delete programme and re install. It is a ralink device I am using!

can i upgrade the graphics in my e6400 lattitude?

how to transfer data between computers?

When I rename photos I get the message – ‘if you change a file extension, the file may become unusable’. Then the photo has to be accessed by right hand click and opened. I need to view the pic at all times. Please help.