He he. Ilang beses na rin akong naka-experience ng ganyan, pero ang best solution as recommended sa net at kahit saan ay yang clean install ng Windows kung wala kang choice or means to fix the cause of the problem. Kung wala kang experience fixing windows problems manually and time to spent, this is the easiest way. Marami kasing dahilan kung bakit nagkakaproblema ang PC.
Sa Win10, yung Reset option or System Restore (while still retaining your existing files) is your best bet assuming may na-corrupt lang sa Windows system files kung saan. Fresh na ulit yung Windows mo without using any recovery disk or external Windows Installer (via USB or DVDRom).
Ang mahirap, kung nabaunan ka ng virus na kumalat na or may sira kang hardware. Any System Restore or Windows Reset will bring back the problem again and again since the problem is still there. Assuming virus/malware/rootkit/ransomeware yan, after resetting Windows, kailangan ay maunahan mong linisin agad yung windows mo, preventing the virus to enable, spread and corrupt your system again. Ihanda mo lahat ng iyong Windows Cleaning tools, switch to safe mode and do your thing. Pag malinis na, stop and restart Windows say twice and observe, if OK, then create a system restore point and use your pc normally onwards.