This article was previously published under Q189787
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When you try to install Internet Explorer 4.01 Service Pack 1, you mayreceive the following error message:
Internet Explorer 4.01 SP1 Active Setup You do not have enough disk space to install Internet Explorer 4.01 SP1 with the options you selected.
Internet Explorer 4.01 SP1 requires 33528 KB of disk space, but Setup will need an additional 12000 KB to complete installation.
You need to have 45528 KB free on Drive C.
This problem may occur even though your hard disk has 50 megabytes (MB) ormore of free space.
The problem can occur due to the way the value for free space on your harddisk is calculated. Information about the amount of free space on yourhard disk is stored in a dword value in the registry. If this amountexceeds 4 gigabytes (GB) of free disk space, the amount over 4 GB is movedinto another dword value, and it is this new value that Setup examines toverify the amount of free space on your hard disk. For example, if thisnew dword value is 50 MB (because the amount over 4 GB is 50 MB), butSetup requires 100 MB, Setup incorrectly interprets the amount of freespace on your hard disk to be 50 MB, and then generates the error messagelisted earlier in this article. Note that this problem can occur withlarge hard disks where the amount of free space on your hard disk isslightly above a multiple of 4 GB. For example, this problem can occur ifyou have 4.05 GB free, 8.05 GB free, 12.05 GB free, and so on.
To work around this problem, reduce the amount of free space on your harddisk to be slightly below a multiple of 4 GB, or increase the amount offree space on your hard disk to be at least 100 MB above a multiple of 4GB.
Microsoft has confirmed this to be a problem in Internet Explorer version4.01 for Windows 95 and Internet Explorer version 4.01 for Windows NT.