solidworks 2018 crashes EVERYTIME@when entering dimension onto a drawing of a very simple part.
Have you tried running the Rx tool to see if it flags anything?
If it is happening on the one drawing/ part then I would:
1./ Run RX>System Maintenance
2./ Local Disk> Properties>General> Disc Clean-Up
3./ Local Disk> Properties>Tools> Optimise
4./ Local Disk> Properties>Tools>Error Checking
If it continues after that I would then do a Repair on the Install
Retrieving data ...