Sinclair brand name and those intellectual property rights where they relate to computers and computer related products", which included the ZX Spectrum, for £5 million. This included Sinclair's unsold stock of Sinclair QLs and Spectrums. Amstrad made more than £5 million on selling these surplus machines alone. Amstrad launched two new variants of the Spectrum: the ZX Spectrum +2, based on the ZX Spectrum 128, with a built-in cassette tape drive (like the CPC 464) and, the following year, the ZX Spectrum +3, with a built-in floppy disk drive (similar to the CPC 664 and 6128), taking the 3" disks that many Amstrad machines used. In 1986 Amstrad entered the IBM PC-compatible arena with the PC1512 system. In standard Amstrad livery and priced at £399 it was a success, capturing more than 25% of the European computer market. It was MS-DOS-based, but with the GEM graphics interface, and later Windows. In 1988 Amstrad attempted to make the first affordable portable personal computer with the PPC512 and 640 models, introduced a year before the Macintosh Portable. They ran MS-DOS on an 8 MHz processor, and the built-in screen could emulate the Monochrome Display Adapter or Color Graphics Adapter. Amstrad's final (and ill-fated) attempts to exploit the Sinclair brand were based on the company's own PCs; a compact desktop PC derived from the PPC 512, branded as the Sinclair PC200, and the PC1512 rebadged as the Sinclair PC500. Amstrad's second generation of PCs, the PC2000 series, were launched in 1989. However, due to a problem with the Seagate ST277R hard disk shipped with the PC2386 model, these had to be recalled and fitted with Western Digital controllers. Amstrad later successfully sued Seagate, but following bad press over the hard disk problems, Amstrad lost its lead in the European PC market. 1990s In the early 1990s, Amstrad began to focus on portable computers rather than desktop computers. In 1990, Amstrad tried to enter the video game console market with the Amstrad GX4000, similar to what Commodore did at the same time with the C64 GS. The console, based on the Amstrad 464 Plus hardware, was a commercial failure, because it used outdated technology, and most games available for it were straight ports of CPC games that could be purchased for much less in their original format. In 1993, Amstrad was licensed by Sega to produce a system which was similar to the Sega