"On the other hand, an HTA runs as a fully trusted application and therefore has more privileges than a normal HTML file; for example, an HTA can create, edit and remove files and registry entries."
You might find this interesting, a story about the development of a popular ZX Spectrum emulator Warajevo:
"The grenades fell everywhere, there was little electrical power (at one time even the hospitals didn't have power for two months!). When we had electricity it was only for 2-3 hours during the night."