The Cupertino, California-based company also said it has sold more than 1 million songs in that same time, a significant increase from the typical rate of 500,000 or 600,000 songs the company had been selling in recent weeks.
"We're off to a great start, and our competition isn't even out of the starting gates yet," Apple CEO Steve Jobs said in a statement.
Apple executives said on Friday that the pace of downloads has been brisk, but the company did not quantify the number of copies of the software that had been downloaded. Jobs introduced the software on Thursday at a star-studded event in San Francisco that featured a performance by Canadian singer and songwriter Sarah McLachlan.
Response to the software has been mixed, with the company garnering a lot of praise, particularly from users of the Mac version of the software who are now using it on both Macs and PCs. However, some customers--including those who use Windows 2000 Professional--have said they experienced various difficulties when running the software.
Apple said it is looking into the problems, which have caused some machines to freeze after iTunes is installed.
The Mac maker is counting on the Windows version of iTunes and the music store to help further boost sales of its iPod digital music player. Apple executives have said the company doesn't make money on the music store but that the software can be a "Trojan horse" to sell more iPods.
