To resolve the issue we advise you to install the latest version of Parallels Desktop 18:
1. Right-click the Parallels Desktop icon in Dock > Check for updates.
2. Follow on-screen instructions.
3. Once Parallels Desktop is updated, start your virtual machine and remove Parallels Tools manually from Add/Remove Programs in Windows XP. The removal process can be sometimes relatively long (~5 min).
4. Click Actions > Reinstall Parallels Tools. Once the process is completed, restart your virtual machine to apply changes.