I have no idea what you do at the beginning. Extracting something? some Version of Lazarus? maybe on top of your current installation?
The units in Lazarus are pre-compiled as .ppu files. those .ppu files can only be used with the fpc version that came with the exact same Lazarus.
If you changed fpc, or you changed the ppu files or anything else, you most likely have ppu files that are unusable.
that can happen if you upgrade Lazarus, but specify a new directory => since that would keep your old config, and unfortunately then point to an older fpc version.
- check the fpc used (Enviroment Menu => options)
- Try to recompile Lazarus (Tools Menu => build lazarus).