ASPack.da is a dangerous file, which is related to PCCleaner 2007. This program is a fake PC optimization tool, which seeks to convince people that they need to purchase its licensed version. However, before you connect to your online bank and make this purchase, you should know that the most of PC Cleaner's alerts are exaggerated and are used only for pushing people into purchasing its license. Instead of wasting your money on cyber threats, you should purchase a reputable anti-spyware and fix your PC completely.
When PCCleaner 2007 enters computer, it installs ASPack.dat file. This file is mostly used for launching a virus, updating it, blocking legitimate security software and similar tasks. However, it may also start degrading your system's performance by displaying commercial advertisements or causing continuous redirects to unsafe websites.
Please, do NOT let Pccleaner.pkg stay on your computer! You should waste no time and remove this file using RegCure Pro or other reputable security tool.