Ensure you download the 32-bit version of IE8 Portable. The 64-bit version of IE8 was notoriously buggy and slower.
That said, if you use IE8 Portable or on a restricted intranet with trusted devices, the risk is manageable. Always run it inside a sandbox, a virtual machine, or with network restrictions. download internet explorer 8 portable windows 7 free
: Most modern websites will not load correctly in IE8 due to outdated rendering engines. Safer Alternatives for Legacy Browsing Ensure you download the 32-bit version of IE8 Portable