A cumulative package of one or more files used to address a problem in a software product.(noun)
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Use "hotfix" in a sentence
"In response, Skype says it released a "hotfix"--a quick fix to hold users over until a full update is ready--for the issue in a minor update released in mid-April, but did not prompt users to update their software because there were no reports that the hole was being exploited in the wild and it was planning on issuing another update early next week."
"If you are not sure whether the hotfix is the correct one for your system, do not install it."
"Note A hotfix is a modification to the commercially available Microsoft product software code to address specific critical problems .."