i have hp desk top with win. xp. there is no updates by google. is there a way to update to window 7 or other windows.

Yep

Buy a copy of W7

I bought a windows 7 laptop for $80 to accompanied certain programs i have. After looking for updates for so long

Not anymore you missed that boat about 4 years ago

XP systems hardware is at end of life limits, maybe time for a new computer.

Call Micro Center for best answer. Recommend buying a new computer.