After the installation bar reaches 100%:
KPB V50 uses a lightweight SQL instance. The installer usually triggers this automatically, but if it hangs: komatsu parts book v50 install
Is installing V50 worth the headache?
The Modern Alternative: Komatsu now pushes Komatsu Care and Online Parts Books (via the Komatsu website). For a monthly fee, you get live part numbers, stock availability, and current pricing. However, if you work in a remote mine or a shop with bad internet, the V50 offline install is still the king. After the installation bar reaches 100%: