By Benjamin Pimentel, MarketWatch

SAN FRANCISCO (MarketWatch) -- Hewlett-Packard Co. shares tumbled Thursday while the rest of the tech sector managed solid gains, thanks to jumps at Microsoft, Yahoo and the video-game sector.

But the session got an unexpected jolt when trading of Nasdaq-listed stocks and options were halted due to a technical glitch.

H-P's (HPQ) slump came a day after a disappointing earnings report that highlighted doubts about Chief Executive Meg Whitman's turnaround strategy.

The stock shed 12.5% to close at $22.22, the worst performer on the Dow Jones Industrial Average which was up more than 50 points.

The previous afternoon, H-P posted mostly in-line results for the third fiscal quarter, but Whitman stunned Wall Street when she said total company year-over-year revenue growth in the next fiscal year is "unlikely."

Whitman said H-P's enterprise group's performance was "very disappointing," a notable comment given the company's bid to strengthen its position in corporate IT. Among new changes to the business, H-P said Dave Donatelli, who had led the enterprise division, has been re-assigned to a new role and replaced by Bill Veghte.

The report quickly sparked a debate on whether Whitman's multi-year turnaround strategy was working.

Citigroup analyst Jim Suva reiterated a buy rating, saying H-P's "turnaround story" was "intact," even as he pointed to "some bumps on the road."

Other analysts were not as upbeat.

Needham's Richard Kugele kept his buy rating, noting how "investors were willing to give the company benefit of the doubt on its restructuring progress years ahead of a revenue recovery."

"We believe that euphoria is finally wearing off," Kugele wrote. "The top leadership changes in the two largest divisions suggest a company still searching for the right formula to restart growth, rather than one well on its way to doing so."

But other major tech issues were in positive territory.

Shares of Microsoft (MSFT) rose 2.5% to close at $32.39, the top gainer on the Dow. Nomura Securities raised its rating to buy from neutral based on "anticipated benefits of shareholder activism."

Yahoo Inc. (YHOO) also saw its shares jump 3% to close at $27.90 after comScore reported that the Web portal's traffic beat that for Google Inc. (GOOG) for the first time since 2011. Google was up a fraction, closing at $873.71.

GameStop (GME) shares were also up 9% to close at $51.91 after the videogagme publisher put out a stronger-than-expected forecast. That helped lift the stocks of videogame publishers such as Electronic Arts (EA) , Activision Blizzard (ATVI) and Take-Two Interactive (TTWO) .

The Nasdaq Composite Index (RIXF) was up 1% to close at 3,639. The Morgan Stanley High Tech 35 Index (MSH) was up 0.3%, while the Philadelphia Semiconductor Index (SOX) was ahead 1.2%.

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