Something seems to be funny with your computer's setup. On my feeble i5 laptop with 16GB, Excel starts in about 3 seconds to the point where I can start doing stuff.
If it's a corporate device, it's usually some anti-virus abomination (or other security-related software) that steals 90% of the resources.
If it's a corporate device, it's usually some anti-virus abomination (or other security-related software) that steals 90% of the resources.